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Liquid crystal composition

a technology of liquid crystal composition and liquid crystal medium, which is applied in the field of liquid crystal displays, can solve the problems of narrow viewing angle, slow response time, and inability to meet the needs of liquid crystal medium used in the active matrix addressing mode display element for va mode, etc., and achieves wide operating temperature range, fast response, and low viscosity

Active Publication Date: 2021-06-01
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The proposed liquid crystal composition achieves a lower viscosity, faster response time, and reduced display defects, making it suitable for wide viewing angle displays like IPS and VA modes, especially in small to medium-sized displays and TVs.

Problems solved by technology

Early commercial TFT-LCD products basically relate to using a TN display mode, and the largest problem thereof is a narrow viewing angle.
However, the liquid crystal medium used in an active matrix addressing mode display element for the VA mode, etc., itself is not perfect; the defects, for example, the residual image level is significantly worse than that of a positive dielectric anisotropic display element, the response time is relatively slow, and the driving voltage is higher.
In addition, since the liquid crystal of the entire panel has a pretilt angle, there is no domino delay phenomenon, a faster response time can also be obtained while maintaining the same drive voltage, and the residual image level will also not be affected; however, due to Fine Slit densely distributed electrodes in pixels, if the electrode width cannot be evenly distributed, the problem of uneven display can easily occur.

Method used

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Examples

Experimental program
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Effect test

example 1

[0093]The formula of the liquid crystal composition and the corresponding properties thereof are as shown in table 3 below.

[0094]

TABLE 3Formula of the liquid crystal composition of Example 1 and thecorresponding properties thereofCategoryLiquid crystal monomer codeContent (%)II5-CY-O411II5-PY-O29II5-COY-O212II3-CCOY-O23II5-CCY-O210II3-CPY-O210I3-CC-210I3-CC-V20I1-PP-2V5IIIC(5)O-W-O410Cp: 55γ1: 80Δn: 0.0948Δε: −4.6

example 2

[0099]The formula of the liquid crystal composition and the corresponding properties thereof are as shown in table 4 below.

[0100]

TABLE 4Formula of the liquid crystal composition of Example 1 and thecorresponding properties thereofCategoryLiquid crystal monomer codeContent (%)II5-CY-O411II5-CLY-O29II3-COY-O212II3-CCOY-O212II5-CCY-O216II3-CPY-O210I3-CC-210I3-CC-V5I1-PP-2V5IVC(5)O-Sc-O44IIIC(5)O-W-O46Cp: 81γ1: 155Δn: 0.106Δε: −5.8

example 3

[0101]The formula of the liquid crystal composition and the corresponding properties thereof are as shown in table 5 below.

[0102]

TABLE 5Formula of the liquid crystal composition of Example 1 and thecorresponding properties thereofCategoryLiquid crystal monomer codeContent (%)II5-CY-O43II5-CLY-O22II3-COY-O22II3-CCOY-O23II5-CCY-O25II3-CPY-O25I3-CC-210I3-CC-V30I1-PP-510IVC(5)O-Sb-O45V3-CPP-2V15V3-CCP-15IIIC(5)O-W-O415Cp: 60γ1: 75Δn: 0.101Δε: −3.4

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Abstract

Disclosed is a liquid crystal composition comprising one or more compounds represented by formula I, one or more compounds represented by formula II, and one or more compounds represented by formula III:The liquid crystal composition has simultaneously a lower rotary viscosity, a better photoelectric performance, a higher clearing point, a good low temperature performance, and less display defects. Further disclosed is a liquid crystal display element or device comprising the liquid crystal composition.

Description

CROSS REFERENCE TO PRIOR APPLICATION[0001]This application claims priority to Chinese Patent Application No. 201810245322.0 (filed on Mar. 23, 2018), which is hereby incorporated by reference in its entirety.TECHNICAL FIELD[0002]The present invention relates to the field of liquid crystal displays. More particularly, the present invention relates to a liquid crystal composition, and a display element or liquid crystal display comprising the liquid crystal composition.BACKGROUND ART[0003]Thin film transistor liquid crystal displays (TFT-LCDs) have undergone a long period of basic research, and after realising large-scale production and commercialisation, thin film transistor liquid crystal displays have become mainstream products in LCD applications due to the advantages of light weight, being environmentally friendly, high performance, etc., thereof: the application of TFT-LCD can be seen everywhere whether in small-sized mobile phone screens, large-sized notebook PCs or monitors or...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G02F1/1333C09K19/44C09K19/34C09K19/32C09K19/30C09K19/12
CPCC09K19/44C09K19/12C09K19/3003C09K19/3028C09K19/3066C09K19/3098C09K19/322C09K19/3405C09K19/3491C09K2019/122C09K2019/123C09K2019/301C09K2019/3004C09K2019/3009C09K2019/3016C09K2019/3021C09K2019/3025C09K2019/3036C09K2019/3408C09K2019/3425C09K19/3402C09K19/58C09K2019/3027C09K2019/3096
Inventor LIANG, ZHIANYUN, GUOLIANGDI, YUJINGSHAO, ZHEKANG, SUMINWANG, DONGMEI
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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